254 lines
7.9 KiB
C
254 lines
7.9 KiB
C
/* $NetBSD: intr.h,v 1.66 2008/04/28 20:23:11 martin Exp $ */
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/*-
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* Copyright (c) 2000, 2001, 2002 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1997 Christopher G. Demetriou. All rights reserved.
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* Copyright (c) 1996 Carnegie-Mellon University.
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* All rights reserved.
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*
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* Author: Chris G. Demetriou
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*
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* Permission to use, copy, modify and distribute this software and
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* its documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
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* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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#ifndef _ALPHA_INTR_H_
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#define _ALPHA_INTR_H_
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#include <sys/evcnt.h>
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#include <machine/cpu.h>
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/*
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* The Alpha System Control Block. This is 8k long, and you get
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* 16 bytes per vector (i.e. the vector numbers are spaced 16
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* apart).
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*
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* This is sort of a "shadow" SCB -- rather than the CPU jumping
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* to (SCBaddr + (16 * vector)), like it does on the VAX, we get
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* a vector number in a1. We use the SCB to look up a routine/arg
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* and jump to it.
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*
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* Since we use the SCB only for I/O interrupts, we make it shorter
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* than normal, starting it at vector 0x800 (the start of the I/O
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* interrupt vectors).
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*/
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#define SCB_IOVECBASE 0x0800
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#define SCB_VECSIZE 0x0010
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#define SCB_SIZE 0x2000
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#define SCB_VECTOIDX(x) ((x) >> 4)
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#define SCB_IDXTOVEC(x) ((x) << 4)
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#define SCB_NIOVECS SCB_VECTOIDX(SCB_SIZE - SCB_IOVECBASE)
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struct scbvec {
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void (*scb_func)(void *, u_long);
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void *scb_arg;
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};
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/*
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* Alpha interrupts come in at one of 4 levels:
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*
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* software interrupt level
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* i/o level 1
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* i/o level 2
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* clock level
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*
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* However, since we do not have any way to know which hardware
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* level a particular i/o interrupt comes in on, we have to
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* whittle it down to 3.
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*/
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#define IPL_NONE 0 /* no interrupt level */
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#define IPL_SOFTCLOCK 1 /* generic software interrupts */
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#define IPL_SOFTBIO 1 /* generic software interrupts */
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#define IPL_SOFTNET 1 /* generic software interrupts */
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#define IPL_SOFTSERIAL 1 /* generic software interrupts */
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#define IPL_VM 2 /* interrupts that can alloc mem */
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#define IPL_SCHED 3 /* clock interrupts */
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#define IPL_HIGH 4 /* all interrupts */
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typedef int ipl_t;
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typedef struct {
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uint8_t _psl;
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} ipl_cookie_t;
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ipl_cookie_t makeiplcookie(ipl_t);
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#define IST_UNUSABLE -1 /* interrupt cannot be used */
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#define IST_NONE 0 /* none (dummy) */
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#define IST_PULSE 1 /* pulsed */
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#define IST_EDGE 2 /* edge-triggered */
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#define IST_LEVEL 3 /* level-triggered */
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#ifdef _KERNEL
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/* Simulated software interrupt register. */
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extern volatile unsigned long ssir;
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/* IPL-lowering/restoring macros */
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void spl0(void);
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static __inline void
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splx(int s)
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{
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if (s == ALPHA_PSL_IPL_0 && ssir != 0)
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spl0();
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else
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alpha_pal_swpipl(s);
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}
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/* IPL-raising functions/macros */
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static __inline int
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_splraise(int s)
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{
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int cur = alpha_pal_rdps() & ALPHA_PSL_IPL_MASK;
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return (s > cur ? alpha_pal_swpipl(s) : cur);
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}
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#define splraiseipl(icookie) _splraise((icookie)._psl)
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#include <sys/spl.h>
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/*
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* Interprocessor interrupts. In order how we want them processed.
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*/
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#define ALPHA_IPI_HALT (1UL << 0)
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#define ALPHA_IPI_MICROSET (1UL << 1)
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#define ALPHA_IPI_SHOOTDOWN (1UL << 2)
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#define ALPHA_IPI_IMB (1UL << 3)
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#define ALPHA_IPI_AST (1UL << 4)
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#define ALPHA_IPI_SYNCH_FPU (1UL << 5)
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#define ALPHA_IPI_DISCARD_FPU (1UL << 6)
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#define ALPHA_IPI_PAUSE (1UL << 7)
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#define ALPHA_IPI_PMAP_REACTIVATE (1UL << 8)
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#define ALPHA_NIPIS 9 /* must not exceed 64 */
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struct cpu_info;
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struct trapframe;
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void alpha_ipi_init(struct cpu_info *);
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void alpha_ipi_process(struct cpu_info *, struct trapframe *);
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void alpha_send_ipi(unsigned long, unsigned long);
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void alpha_broadcast_ipi(unsigned long);
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void alpha_multicast_ipi(unsigned long, unsigned long);
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/*
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* Alpha shared-interrupt-line common code.
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*/
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struct alpha_shared_intrhand {
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TAILQ_ENTRY(alpha_shared_intrhand)
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ih_q;
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struct alpha_shared_intr *ih_intrhead;
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int (*ih_fn)(void *);
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void *ih_arg;
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int ih_level;
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unsigned int ih_num;
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};
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struct alpha_shared_intr {
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TAILQ_HEAD(,alpha_shared_intrhand)
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intr_q;
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struct evcnt intr_evcnt;
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char *intr_string;
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void *intr_private;
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int intr_sharetype;
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int intr_dfltsharetype;
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int intr_nstrays;
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int intr_maxstrays;
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};
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#define ALPHA_SHARED_INTR_DISABLE(asi, num) \
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((asi)[num].intr_maxstrays != 0 && \
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(asi)[num].intr_nstrays == (asi)[num].intr_maxstrays)
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void softintr_dispatch(void);
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struct alpha_shared_intr *alpha_shared_intr_alloc(unsigned int, unsigned int);
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int alpha_shared_intr_dispatch(struct alpha_shared_intr *,
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unsigned int);
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void *alpha_shared_intr_establish(struct alpha_shared_intr *,
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unsigned int, int, int, int (*)(void *), void *, const char *);
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void alpha_shared_intr_disestablish(struct alpha_shared_intr *,
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void *, const char *);
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int alpha_shared_intr_get_sharetype(struct alpha_shared_intr *,
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unsigned int);
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int alpha_shared_intr_isactive(struct alpha_shared_intr *,
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unsigned int);
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int alpha_shared_intr_firstactive(struct alpha_shared_intr *,
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unsigned int);
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void alpha_shared_intr_set_dfltsharetype(struct alpha_shared_intr *,
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unsigned int, int);
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void alpha_shared_intr_set_maxstrays(struct alpha_shared_intr *,
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unsigned int, int);
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void alpha_shared_intr_reset_strays(struct alpha_shared_intr *,
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unsigned int);
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void alpha_shared_intr_stray(struct alpha_shared_intr *, unsigned int,
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const char *);
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void alpha_shared_intr_set_private(struct alpha_shared_intr *,
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unsigned int, void *);
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void *alpha_shared_intr_get_private(struct alpha_shared_intr *,
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unsigned int);
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char *alpha_shared_intr_string(struct alpha_shared_intr *,
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unsigned int);
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struct evcnt *alpha_shared_intr_evcnt(struct alpha_shared_intr *,
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unsigned int);
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extern struct scbvec scb_iovectab[];
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void scb_init(void);
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void scb_set(u_long, void (*)(void *, u_long), void *, int);
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u_long scb_alloc(void (*)(void *, u_long), void *);
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void scb_free(u_long);
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#define SCB_ALLOC_FAILED ((u_long) -1)
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#endif /* _KERNEL */
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#endif /* ! _ALPHA_INTR_H_ */
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